Deadline: 19-May-2026
The European Commission is inviting applications to develop a lightweight and reliable liquid hydrogen tank for hydrogen-powered aircraft. The call focuses on creating a safe tank design at TRL 4, achieving a gravimetric index of at least 40%, ensuring minimum 12-hour dormancy, and validating performance through on-ground cryogenic and tightness testing.
About the Opportunity
The European Commission is seeking projects that can develop advanced liquid hydrogen storage tanks for use in future hydrogen-powered aircraft.
The goal is to support the development of lightweight, safe, and dependable hydrogen tank systems that can help make hydrogen aviation more practical. Since hydrogen storage is one of the biggest technical challenges in aircraft design, this call is aimed at improving both safety and efficiency.
This opportunity is especially relevant for organisations working in:
- Hydrogen aviation
- Cryogenic storage systems
- Aerospace structures and materials
- Aircraft fuel system integration
- Tank safety and containment technologies
- Clean aviation R&D
Funding Information
The information provided states:
- Funding for this programme amounts to €329,500,000
Important Clarification
Because this appears to be a specific technical topic, the figure of €329.5 million may refer to the broader call or programme envelope, not necessarily the exact budget for this individual topic.
For article accuracy, it is best to state:
- The broader call funding figure is €329,500,000 as provided
- Applicants should verify the exact topic budget, maximum EU contribution per project, and number of expected grants in the official call documents
Programme Objectives
The main objective is to develop a liquid hydrogen tank design that is both lightweight and reliable for aircraft use.
Key objectives include:
- Develop a safe and reliable liquid hydrogen tank
- Reach TRL 4
- Achieve a gravimetric index of at least 40%
- Demonstrate dormancy of at least 12 hours
- Validate performance through:
- On-ground cryogenic testing
- Tightness testing
- Support future integration into hydrogen-powered aircraft concepts
What Projects Are Expected to Deliver
Projects are expected to go beyond concept studies and provide tested technical validation.
Expected outcomes include:
- A validated hydrogen tank design for aviation use
- Demonstration of safety and reliability
- Evidence that the tank reaches TRL 4
- Proof of minimum 40% gravimetric index
- Proof of minimum 12-hour dormancy
- Successful on-ground cryogenic performance testing
- Successful tightness validation
What This Means in Practice
This is a technology development and validation call, not just a theoretical design exercise.
Applicants should show:
- A strong tank design concept
- Realistic engineering assumptions
- A clear test and validation plan
- Practical relevance to future hydrogen aircraft integration
Who Is Eligible?
Eligible participants include:
- Any legal entity, regardless of location
- Entities from EU Member States
- Entities from Horizon Europe associated countries
- Entities from non-associated third countries (subject to call rules)
- International organisations
Legal Entity Definition
Eligible applicants may include:
- Natural persons
- Legal persons
- Entities participating without formal legal personality, where allowed by the call rules
Applicants must comply with:
- Horizon Europe regulations
- Any topic-specific eligibility requirements
Best-Suited Applicants
This call is especially relevant for:
- Aerospace hydrogen storage developers
- Cryogenic tank engineering companies
- Aircraft fuel system integrators
- Advanced materials developers
- Aviation safety and testing organisations
- Universities and RTOs
- Hydrogen propulsion consortia
- Clean aviation research partnerships
Why This Funding Matters
Hydrogen storage is one of the most critical barriers to hydrogen-powered aviation.
Why this opportunity matters:
- Lightweight tanks improve aircraft efficiency
- Reliable storage improves safety and operability
- Better dormancy reduces energy loss
- Strong validation helps accelerate future aircraft integration
- It supports long-term progress toward zero-emission aviation
This makes the call strategically important for organisations working on next-generation aircraft propulsion systems.
How to Apply
A strong application should clearly connect tank performance targets with realistic testing and aviation relevance.
Steps to Apply
- Confirm eligibility
Make sure your organisation qualifies under Horizon Europe and any specific call conditions. - Develop the tank concept
Clearly explain the liquid hydrogen tank architecture, materials, insulation, and safety features. - Address the required performance targets
Show how the design will achieve:- TRL 4
- ≥40% gravimetric index
- ≥12-hour dormancy
- Build a robust validation plan
Include realistic on-ground cryogenic and tightness testing methods. - Demonstrate aviation relevance
Explain how the solution supports future hydrogen-powered aircraft integration. - Build the right consortium if needed
Include expertise in cryogenics, tank structures, aerospace safety, hydrogen systems, and testing. - Verify official topic details
Check the official topic page for the exact budget, action type, deadlines, and proposal requirements.
Tips for Applicants
To improve competitiveness:
- Focus on measurable technical targets
- Show a credible TRL 4 pathway
- Emphasise weight efficiency and safety
- Present strong cryogenic test methodology
- Demonstrate practical aircraft integration potential
- Avoid unsupported performance claims
Common Mistakes to Avoid
Avoid these issues:
- Treating the project as a concept-only design study
- Not clearly addressing the 40% gravimetric index
- Weak or unclear 12-hour dormancy strategy
- No detailed cryogenic/tightness validation plan
- Assuming €329.5 million is the exact topic budget without confirmation
- Missing Horizon Europe or topic-specific eligibility conditions
FAQs
1. What is the goal of this European Commission call?
The call supports the development of a lightweight, safe, and reliable liquid hydrogen tank for hydrogen-powered aircraft.
2. What TRL must projects achieve?
Projects are expected to reach TRL 4.
3. What are the main technical targets?
Projects should aim for:
- Gravimetric index of at least 40%
- Dormancy of at least 12 hours
- Successful on-ground cryogenic and tightness testing
4. Who can apply?
Any legal entity may be eligible, including entities from non-associated third countries and international organisations, subject to Horizon Europe and topic-specific rules.
5. What is the stated funding amount?
The provided information states €329,500,000, but applicants should confirm whether this is the overall programme/call budget or the specific topic budget.
6. Why is this important for hydrogen aviation?
Because hydrogen aircraft need lightweight, safe, and efficient storage systems, and liquid hydrogen tanks are a core enabling technology.
Conclusion
This European Commission liquid hydrogen tank call is an important opportunity for organisations developing hydrogen storage technologies for aviation.
By supporting TRL 4 tank development and validation, the initiative can help move hydrogen-powered aircraft closer to practical deployment through safer, lighter, and more efficient storage solutions.
For more information, visit European Commission.